Step 1

Set up a grill for even, medium-high heat. If using a charcoal grill, build the coals evenly on the bottom.

Step 2

Place a Dutch oven on the grill and coat the bottom with a film of olive oil, followed by the onions and garlic. Season with salt and pepper and cook until the onions begin to soften, 2 to 3 minutes. Stir in the tomatoes. Add the anchovies and, using a wooden spoon, break them down into small pieces. Add the red pepper flakes, stirring to melt into the oil. Add 4 1/2 cups water and bring to a simmer. Season with salt and pepper, then add the pasta. Close the lid of the grill and cook according to package directions. Remove from the heat and stir in the parsley, capers, butter, 2 tablespoons olive oil and the Parmesan. Serve with some more black pepper, a drizzle of olive oil and more Parmesan.